Cause when they say "Cold air" it is not accomplished by putting an open air filter under the hood that sucks in under hood hot air. Your in fender air inlet on the stock box is an actual "Cold air" intake. I had a K&N in my stock box for years. Then when I was upgrading the intake system I went with the open cone filter that sits in the fender and has a plate to keep under hood hot air away from it. Mine also has no metal plate in the front section of the cone. Its filter media all around the cone area and where the metal cap would be as well. I cant find the exact set up I bought a few years back but this should give you an idea of what im talking about:

Cause when they say "Cold air" it is not accomplished by putting an open air filter under the hood that sucks in under hood hot air. Your in fender air inlet on the stock box is an actual "Cold air" intake. I had a K&N in my stock box for years. Then when I was upgrading the intake system I went with the open cone filter that sits in the fender and has a plate to keep under hood hot air away from it. Mine also has no metal plate in the front section of the cone. Its filter media all around the cone area and where the metal cap would be as well. I cant find the exact set up I bought a few years back but this should give you an idea of what im talking about:

The headers in the link look like stock units other than the coating. The coating would help reduce some of that under hood hot air but you would not notice any more power from them unless I missed something. If I was to consider swapping headers I would look into some long tubes with that coating on them. Would probably not be able to find such a good deal, but in the long run its the best you could do. My car has stock headers, off road "H" pipe, and Flowmaster 40's. The headers have been rusty since I bought the car in 2003 and my only issue with them are bolts that back out every now and then. My car is an 86 and the ones I have are still going strong. Not sure if that helps

The headers in the link look like stock units other than the coating. The coating would help reduce some of that under hood hot air but you would not notice any more power from them unless I missed something. If I was to consider swapping headers I would look into some long tubes with that coating on them. Would probably not be able to find such a good deal, but in the long run its the best you could do. My car has stock headers, off road "H" pipe, and Flowmaster 40's. The headers have been rusty since I bought the car in 2003 and my only issue with them are bolts that back out every now and then. My car is an 86 and the ones I have are still going strong. Not sure if that helps

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Cool, thats kinda what I thought. I'll skip the headers altogether. Save up for a KB instead.

Test have shown there is not much of a difference in HP gains between long tubes and various shorty or mid-length headers.

Those pictured are not Stock units. Stock headers can be best identified by the small tubes and the noted pinches in the bends probably designed-in for optimal bolt clearance> these are a couple factors that make stock units fall short on flow.

Ah yes. Memories of the old March Ram Air kits we used in the 80's that sucked up every leaf, bug, and drop of water on the road. Those were all the rage until people started hyrdolocking their engines by sucking up water when it rained.